Zeljko Straka
type: MusicGroup
genre: sandalwood
popularity: 3
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954555
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/aeccb03c-14ff-4cd5-8117-e9c6c3e820cc.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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  value: {"copyright_id":"0xf2af49045e156b2910648d1ec4bd05d360ab3522005aef0001db542c01cd7243","name":"Zeljko Straka","registered_at":"2026-06-20T11:16:50Z","symbol":"NIM1600407","token_address":"0x2b1edad3e89eb87350f0b12520e69341f03c280f","type":"artist","uuid":"aeccb03c-14ff-4cd5-8117-e9c6c3e820cc"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af49045e156b2910648d1ec4bd05d360ab3522005aef0001db542c01cd7243. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeccb03c-14ff-4cd5-8117-e9c6c3e820cc.json and https://artists.proofprofile.net/proofs/artist/aeccb03c-14ff-4cd5-8117-e9c6c3e820cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:14:15Z
  text: {"copyright_id":"0xf2af49045e156b2910648d1ec4bd05d360ab3522005aef0001db542c01cd7243","name":"Zeljko Straka","registered_at":"2026-06-20T11:16:50Z","symbol":"NIM1600407","token_address":"0x2b1edad3e89eb87350f0b12520e69341f03c280f","type":"artist","uuid":"aeccb03c-14ff-4cd5-8117-e9c6c3e820cc"}
album: VANHAL, J.B.: Double Bass Concerto in D major / HAYDN, F.J.: Divertimento in E flat major / SPERGER, J.M.: Quartet in D major (Straka)
  type: MusicAlbum
  date published: 1998
track: Double Bass Concerto in D Major: II. Adagio
  type: MusicRecording
  duration: PT8M41S
  duration ms: 521306
  explicit: false
  by artist: Johann Baptist Vanhal
  by artist: Camerata Musica
  by artist: Zeljko Straka
  by artist: Klaus Trumpf
  in album: Double Bass (Greatest Works)
    type: MusicAlbum
    date published: 1965
  genre: classical
  isrc code: DES380013412
  additional property: CopyrightID
  additional property: CopyrightStatus
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    value: https://blockstream.info/api/block-height/957120
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380013412
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:22:41Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5981d1b6f359b263dab33ed337a490958ac9acbbe9b842d667f71a60f41707b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380013412.
    date published: 2026-07-08T03:22:41Z
  audio: Double Bass Concerto in D Major: II. Adagio
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 128.265
    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.936
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.934
    additional property: Liveness
      type: PropertyValue
      value: 0.109
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.09
    additional property: Loudness (dB)
      type: PropertyValue
      value: -28.758
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major